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UN Regulation 37Edit

UN Regulation 37 covers motor vehicle filament lamps. These are categorized in three groups: those without general restriction that can be used in any application, those acceptable only for signalling lights (not for road illumination lamps), and those no longer allowable as light sources for new type approvals but still permitted for production as replacement parts.

Group 1 (Without general restrictions)
CategoryFilamentsNominal power
(major/minor filament
where applicable)
Cap (base)
per IEC 60061
Other approvalsRemarksImage
H1 1 6V & 12V: 55W
24V: 70W
P14.5s USA, Japan H1-Lampe-12V-55W 20050302 1950 2247
H3 1 6V & 12V: 55W
24V: 70W
PK22s USA, Japan Osram H3 12V 55W
H4 2 6V & 12V: 60/55W
24V: 75/70W
P43t Japan Similar US bulb: HB2 (9003)[1] H4 Philips Premium used
H7 1 12V: 55W
24V: 70W
PX26d USA, Japan Philips H7 12V 55W
H8 1 12V: 35W PGJ19-1 USA Philips H8 12V 35W
H8B 1 12V: 35W PGJY19-1 USA
H9 1 12V: 65W PGJ19-5 USA
H9B 1 12V: 65W PGJY19-5 USA
H10 1 12V: 42W PY20d USA US trade # 9145
H11 1 12V: 55W
24V: 70W
PGJ19-2 USA
H11B 1 12V: 55W
24V: 70W
PGJY19-2 USA
H12 1 12V: 53W PZ20d USA US trade # 9055
H13 2 12V: 60/55W P26.4t USA US trade # 9008
H13A 2 12V: 60/55W PJ26.4t USA
H14 2 12V: 60/55W P38t Japan
H15 2 12V: 55/15W PGJ23t-1 USA 15w filament for Daytime running lamp function Osram H15 12V-15-55W lamp
H16 1 12V: 19W PGJ19-3
H16B 1 12V: 19W PGJY19-3
H21W 1 12V & 24V: 21W BAY9s
H27W/1 1 12V: 27W PG13 USA US trade # 880
H27W/2 1 12V: 27W PGJ13 USA US trade # 881
HB3 1 12V: 60W P20d 90° USA, Japan US trade # 9005
HB3A 1 12V: 60W P20d 180° USA US trade # 9005XS
HB4 1 12V: 51W P22d 90° USA, Japan US trade # 9006
HB4A 1 12V: 51W P22d 180° USA US trade # 9006XS
HIR1 1 12V: 60W PX20d USA, Japan US trade # 9011
HIR2 1 12V: 55W PX22d USA, Japan US trade # 9012
HS1 2 6V & 12V: 35/35W PX43t For motorcycles
HS2 1 6V & 12V: 15W PX13.5s For motorcycles
HS5 2 12V: 35/30W P23t For motorcycles
HS5A 2 12V: 45/40W PX23t For motorcycles
HS6 2 12V: 40/35W PX26.4t For motorcycles
PX24W 1 12V: 24W PGU20-7
PSX24W 1 12V: 24W PG20-7
PSX26W 1 12V: 26W PG18.5d-3
S2 2 6V & 12V: 35/35W BA20d For motorcycles
S3 2 6V & 12V: 15W P26s For mopeds
Group 2 (Only for use in signalling lamps, cornering lamps, reversing lamps and rear registration plate lamps)
CategoryCap (Base)FilamentsNominal Power
(Major/Minor
where applicable)
Comments Image
C5W SV8.5 1 6V, 12V, 24V: 5W Old designation: C11 C5W lamp
H6W BAX9s 1 12V: 6W H6W Halogen Lampe
HY6W BAZ9s 1 12V: 6W Amber
H10W/1 BAU9s 1 12V: 10W
HY10W BAUZ9s 1 12V: 10W Amber
H21W BAY9s 1 12V & 24V: 21W
HY21W BAW9s 1 12V & 24V: 21W Amber
P13W PG18.5d-1 1 12V: 13W
PW13W WP3.3×14.5-7 1 12V: 13W
PC16W PU20d-1 1 12V: 16W
PCR16W PU20d-7 1 12V: 16W Red
PW16W WP3.3×14.5-8 1 12V: 16W
PWR16W WP3.3×14.5-10 1 12V: 16W Red
PWY16W WP3.3×14.5-9 1 12V: 16W Amber
PS19W PG20-1 1 12V: 19W
PSY19W PG20-2 1 12V: 19W Amber
PW19W WP3.3×14.5-1 1 12V: 19W
PWR19W WP3.3×14.5-5 1 12V: 19W Red
PWY19W WP3.3×14.5-2 1 12V: 19W Amber
P21W BA15s 1 6V, 12V, 24V: 21W Old designation: P25-1 P21W
PR21W BAW15s 1 12V & 24V: 21W Red
PY21W BAU15s 1 12V & 24V: 21W Amber
P21/4W BAZ15d 2 12V & 24V: 21/4W
PR21/4W BAU15d 2 12V & 24V: 21/4W Red
P21/5W BAY15d 2 6V, 12V, 24V: 21/5W Old designation: P25-2 Osram 12V 21W 5W
PR21/5W BAW15d 2 12V & 24V: 21/5W Red
P24W PGU20-3 1 12V: 24W
PY24W PGU20-4 1 12V: 24W Amber
PH24WY 1 12V: 24W Amber Philips PH24WY
PS24W PG20-3 1 12V: 24W
PSY24W PG20-4 1 12V: 24W Amber Philips PSY24WSVplus lamp
PW24W WP3.3×14.5-3 1 12V: 24W
PWR24W WP3.3×14.5-6 1 12V: 24W Red
PWY24W WP3.3×14.5-4 1 12V: 24W Amber
P27W W2.5×16d 1 12V: 27W US trade # 3156
P27/7W W2.5×16q 2 12V: 27/7W US trade # 3157 P27 7W lamp
PR27/7W WU2.5x16 2 12V: 27/7W Red
PY27/7W WX2.5x16q 2 12V: 27/7W Amber
US trade # 3757A
PY27 7W lamp used
R5W BA15s 1 6V, 12V, 24V: 5W Old designation: R19/5 R5W lamp
RR5W BAW15s 1 12V & 24V: 5W Red
R10W BA15s 1 6V, 12V, 24V: 10W Old designation: R19/10 R10W lamp
RR10W BAW15s 1 12V & 24V: 10W Red
RY10W BAU15s 1 6V, 12V, 24V: 10W Amber
T1.4W P11.5d 1 12V: 1.4W
T4W BA9s 1 6V, 12V, 24V: 4W Old designation: T8/4 T4W lamp
W2.3W W2×4.6d 1 12V: 2.3W
WY2.3W W2×4.6d 1 12V: 2.3W Amber
W3W W2.1×9.5d 1 6V, 12V, 24V: 3W Old designation: W10/3
W5W W2.1×9.5d 1 6V, 12V, 24V: 5W Old designation: W10/5 Philips 12V 5W
WR5W W2.1×9.5d 1 12V & 24V: 5W Red
WY5W W2.1×9.5d 1 6V, 12V, 24V: 5W Amber
W10W W2.1×9.5d 1 6V & 12V: 10W
WY10W W2.1×9.5d 1 6V & 12V: 10W
W15/5W WZ3×16q 2 12V: 15/5W for motorcycles
W16W W2.1×9.5d 1 12V: 16W US trade # 921 W16W lamp broken
WY16W W2.1×9.5d 1 12V: 16W Amber, US trade # 921NA
W21W W3×16d 1 12V: 21W US trade # 7440 W21W lamp
WY21W WX3×16d 1 12V: 21W Amber
US designation: 7440NA
WY21W lamp
WP21W WY2.5×16d 1 12V: 21W
WPY21W WZ2.5×16d 1 12V: 21W Amber
W21/5W W3×16q 2 12V: 21/5W US designation: 7443
WR21/5W WY3×16q 2 12V: 21/5W Red
Group 3 (For replacement purposes only)
CategoryCap (Base)FilamentsNominal powerComments Image
C21W SV8.5 1 12V: 21W Old designation: C15,
for reversing lamp only
H2[2] X511 1 12V/55W Deleted from Reg 37 H2 automotive lamp
P19W PGU20-1 1 12V: 19W
PC16W PU20d-1 1 12V: 16W
PCR16W PU20d-7 1 12V: 16W Red
PCY16W PU20d-2 1 12V: 16W Amber
PR19W PGU20-5 1 12V: 19W Red
PY19W PGU20-2 1 12V: 19W Amber
PSR19W PG20-5 1 12V: 19W Red
PSR24W PG20-6 1 12V: 24W Red
PR24W PGU20-6 1 12V: 24W Red
S1 BA20d 2 6V & 12V: 25/25W for motorcycles

UN Regulation 99Edit

UN Regulation 99 covers gas discharge light sources for use in vehicle headlamps.

CategoryCap (Base)Nominal powerRemarks Image
D1R PK32d-3 85V/35W Integral ignitor
For reflector systems
D1S PK32d-2 85V/35W Integral ignitor
For projector systems
D2R P32d-3 85V/35W For reflector systems
D2S P32d-2 85V/35W For projector systems Xenonlamp
D3R PK32d-6 42V/35W Mercury-free
Integral ignitor
For reflector systems
D3S PK32d-5 42V/35W Mercury-free
Integral ignitor
For projector systems
D4R P32d-6 42V/35W Mercury-free
For reflector systems
D4S P32d-5 42V/35W Mercury-free
For projector systems
D5S PK32d-[7] 42V: 25W Ballast output voltage
D6S P32d-1 42V: 25W
D8S PK32d-1 42V: 25W

Old German Specifications Edit

The German national regulation for vehicle bulbs is now superseded by international UN Regulations. Bulbs according to the old German regulation are still manufactured.

German vehicle bulbs per DIN
CategoryNominal powerFilamentsCap (Base)Comments Image
Form K (DIN 72601, Part 4) 6V, 10W 1 SV8.5-8 11 × 41 mm
Form K (DIN 72601, Part 4) 12V, 10W 1 SV8.5-8 11 × 41 mm
Form K (DIN 72601, Part 6) 6V, 18W 1 SV8.5-8 15 × 41 mm
Form K (DIN 72601, Part 6) 12V, 18W 1 SV8.5-8 15 × 41 mm
Form K (DIN 72601, Part 6) 24V, 18W 1 SV8.5-8 15 × 41 mm
Form R (DIN 72601, Part 6) 6V, 18W 1 BA15s
Form R (DIN 72601, Part 6) 12V, 18W 1 BA15s
Form R (DIN 72601, Part 6) 24V, 18W 1 BA15s
Form S (DIN 72601, Part 7) 6V, 18/5W 2 BAY15d
Form S (DIN 72601, Part 7) 12V, 18/5W 2 BAY15d
Form S (DIN 72601, Part 7) 24V, 18/5W 2 BAY15d

United States and CanadaEdit

Replaceable Light Sources for Vehicle Headlamps
Bulb TypeTrade Number[3]Cap (Base)FilamentsNominal power @ 12.8v
(High/Low beam
where applicable)
Comments Image
HB1 9004 P29t 2 65/45W
HB2 9003 P43t-38 2 60/55W
European H4 w/stricter geometric tolerances
& lower max output limit
HB3 9005 P20d (90°) 1 65W
HB3A 9005XS P20d (straight) 1 65W HB3 w/180° straight base
HB4 9006 P22d (90°) 1 55W
HB4A 9006XS P22d (180° straight) 1 55W HB4 w/180° straight base
HB5 9007 PX29t 2 65/55W
H13 9008 P26t 2 65/55W


Others
CategoryCap (Base)FilamentsNominal powerComments Image
PC194[4] ? 1 14V?/3.78W, ? Used on circuit boards
for e.g. dash lights
PC194 lamp

Other countries Edit

Others
CategoryCap (Base)FilamentsElectrical CharacteristicsComments Image
H3C 1 6V/55W,
12V/55W,
24V/70W
Japan
(USA for unregulated auxiliary lamps only)
H3c

References Edit

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